Tagging Methods and Members

I'm working on a Language Service, and I'd like to tag things are methods and members and their definitions so I can later in my resolver return them as such for intellisense. How would I go about that?

Well, if you work with ParseTree/ParseTreeNode objects, then there's no extra "tag" field or dictionary there; maybe it's worth adding it, I'll think about it. For now you can use ParseTreeNode.AstNode field (it is object type) to store your tagging
object.

I've got the AST building now, but I was wondering if there was a way to get the grammar match and it's text, as well as it's row/col data. I can't figure out how to grab method names for doing intelisence goto.

Are you producing AST or ParseTree only? if it is ParseTree, then there's Span property (which includes Location and length of the source fragment); you can then get the full source fragment from source text using these;

Method names - my guess is you have to search parse/AST tree for specific "FunctionDef" nodes, then extract function name from it (it's one of its children I guess).

AST nodes also have references to source locations, but this depends on your AST model.